Sodium hydride → 7-[(2,4-Dichloro-5-methoxyphenyl)amino]-2-methylthieno[3,2-b]pyridine-6-carbonitrile

HRID 1178636Notes

Reaction equation

HRID 1178636 reaction equation
[Cl:1][C:2]1[CH:8]=[C:7]([Cl:9])[C:6]([O:10][CH3:11])=[CH:5][C:3]=1[NH2:4].[H-].[Na+].Cl[C:15]1[C:20]([C:21]#[N:22])=[CH:19][N:18]=[C:17]2[CH:23]=[C:24]([CH3:26])[S:25][C:16]=12>O1CCCC1>[Cl:1][C:2]1[CH:8]=[C:7]([Cl:9])[C:6]([O:10][CH3:11])=[CH:5][C:3]=1[NH:4][C:15]1[C:20]([C:21]#[N:22])=[CH:19][N:18]=[C:17]2[CH:23]=[C:24]([CH3:26])[S:25][C:16]=12

Participants

5

Reactant 3

HCID 24758Sodium hydrideHCID 14766362,4-Dichloro-5-methoxyanilineHCID 222566287-Chloro-2-methylthieno[3,2-b]pyridine-6-carbonitrile

Product 1

HCID 117262657-[(2,4-Dichloro-5-methoxyphenyl)amino]-2-methylthieno[3,2-b]pyridine-6-carbonitrileYield 22.5%

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent

Procedure

A mixture of 2,4-dichloro-5-methoxyaniline (507 mg, 2.64 mmol) and 60% sodium hydride (105.6 mg, 2.64 mmol) in 15 mL of tetrahydrofuran is heated at reflux for 1 hour. The solution is cooled and 7-chloro-2-methylthieno[3,2-b]pyridine-6-carbonitrile (275.3 mg, 1.32 mmol) is added. The reaction mixture is heated at reflux for 6 hours, cooled to room temperature and partitioned between dichloromethane and water. The organic layer is washed with saturated aqueous sodium chloride, dried over sodium sulfate, filtered and concentrated in vacuo. The residue is purified by flash column chromatography eluting with a gradient of 5% ethyl acetate in hexane to 20% ethyl acetate in hexane followed by preparative thin layer chromatography developing with 20% ethyl acetate in dichloromethane, to provide 108 mg of 7-[(2,4-dichloro-5-methoxyphenyl)amino]-2-methylthieno[3,2-b]pyridine-6-carbonitrile as an off white solid, mp 213–214° C.; 1H NMR (DMSO-d6) δ 2.51 (s, 3H), 3.85 (s, 3H), 7.20 (s, 1H), 7.35 (s, 1H), 7.75 (s, 1H), 8.55 (s, 1H), 9.56 (s, 1H); MS 362.1, 364.3 (M+H)+.

Workup

  1. temperatureis heated
  2. temperatureat reflux for 1 hour
  3. temperatureThe solution is cooled
  4. temperatureThe reaction mixture is heated
  5. temperatureat reflux for 6 hours
  6. custompartitioned between dichloromethane and water
  7. washThe organic layer is washed with saturated aqueous sodium chloride
  8. dry with materialdried over sodium sulfate
  9. filtrationfiltered
  10. concentrationconcentrated in vacuo
  11. customThe residue is purified by flash column chromatography
  12. washeluting with a gradient of 5% ethyl acetate in hexane to 20% ethyl acetate in hexane

Sources & evidence

ORD record
ord-f50d8f39946841bd97e248df0a728506
Source dataset
uspto-grants-2007_10
Patent number
US07276519B2

Reaction notes

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